CN110793994B - Method for testing performance of coke oven air compression sealing repair material - Google Patents
Method for testing performance of coke oven air compression sealing repair material Download PDFInfo
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- CN110793994B CN110793994B CN201910871639.XA CN201910871639A CN110793994B CN 110793994 B CN110793994 B CN 110793994B CN 201910871639 A CN201910871639 A CN 201910871639A CN 110793994 B CN110793994 B CN 110793994B
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Abstract
The invention belongs to the technical field of coke oven repair, and particularly relates to a method for testing the performance of a coke oven air compression sealing repair material. The method for inspecting the performance of the coke oven air compression sealing repair material comprises the following steps: (1) putting a sample to be detected into a coke assay crucible, and uniformly stirring; (2) putting the coke assay crucible with the sample to be detected, which is processed in the step (1), into a muffle furnace, keeping the surface of the sample to be detected flat, and sequentially heating the sample to be detected to 900-950 ℃, 1100-1150 ℃ and 1360-1400 ℃; (3) keeping the temperature at 1360 ℃ for 10-15 min; (4) naturally cooling at room temperature; (5) and judging the performance of the sample to be detected according to the appearance, the quality and/or the volume of the sample to be detected. The method for inspecting the performance of the coke oven air compression sealing repair material can be used for conveniently detecting the performance of the air compression sealing repair material and conveniently and visually knowing the use performance of the air compression sealing repair material.
Description
Technical Field
The invention belongs to the technical field of coke oven repair, and particularly relates to a method for testing the performance of a coke oven air compression sealing repair material.
Background
At present, the coke oven leakage is a continuous key problem in the coking industry, the leakage not only causes the heat energy loss of the coke oven, but also causes the environmental pollution problem, and the coke oven leakage treatment is also an urgent work of the industry. The main methods for treating the series leakage of the coke oven at present are conventional methods such as welding repair, plastering repair, air pressure sealing and the like. The air compression sealing is to make the superfine air compression sealing repair material enter the combustion chamber from the leakage gap, and the air compression sealing repair material is hung at the brick gap in the process, thereby playing the role of sealing and stopping leakage. The air compression sealing repair material is a silicon material, and the melting temperature of dry powder is required to be consistent with the average temperature of a furnace wall. Can be melted in the cracks to form a sealing film.
In the prior art, the quality of the air pressure sealing repair material is generally inspected by respectively detecting indexes such as chemical components, refractoriness and granularity, and the detection steps are complicated. In addition, due to the special environment of the use of the air compression sealing repair material, the indexes cannot visually reflect the use performance of the air compression sealing repair material, and each enterprise can only determine the use effect of the air compression sealing repair material by performing actual verification in the use of the coke oven. The method for verifying the air compression sealing repair material through actual use has hysteresis, the cost of the air compression sealing repair material is high, and the uncertainty of the air compression sealing repair material can also influence the service life of the coke oven.
Disclosure of Invention
The invention provides a method for testing the performance of an air compression sealing repair material of a coke oven, which can be used for conveniently testing the performance of the air compression sealing repair material and conveniently and visually knowing the use performance of the air compression sealing repair material.
The method for inspecting the performance of the coke oven air compression sealing repair material adopts the following technical scheme: a method for testing the performance of a coke oven air compression sealing repair material comprises the following steps: (1) putting a sample to be detected into a coke assay crucible, and uniformly stirring; (2) and (3) heating: putting the coke assay crucible with the sample to be detected (air compression sealing repair material) processed in the step (1) into a muffle furnace, keeping the surface of the sample to be detected flat, heating the sample to be detected to 900-950 ℃ at the speed of 40-55 ℃/min, heating the sample to be detected from 900-950 ℃ to 1100-1150 ℃ at the heating speed of 33-38 ℃/min, and heating the sample to be detected to 1360-1400 ℃ from 1100-1150 ℃ at the heating speed of 20-25 ℃/min; (3) and (3) heat preservation: after the temperature rise is finished, keeping the temperature at 1360 ℃ for 10-15 min; (4) taking out the mixture from a muffle furnace, and naturally cooling the mixture at room temperature; (5) observing whether the sample to be detected is bonded with the coal coke assay crucible or not and whether the sample to be detected is separated from the coal coke assay crucible or not in the cooling process; and when the temperature of the coke testing crucible is reduced to the room temperature, inspecting the quality and/or volume change, the appearance whether the sample to be detected is molten or not and whether cracks exist or not. The inventor finds that the air compression sealing repair material with good service performance has adhesive performance after being processed at high temperature, if the adhesive performance is good, the air compression sealing repair material is easy to be adhered with the coal tar assay crucible, and the adhesive performance of the sample to be detected (the air compression sealing repair material) can be intuitively inspected by observing whether the sample to be detected is adhered with the coal tar assay crucible or not and whether the sample to be detected is separated from the coal tar assay crucible or not in the cooling process. In addition, if the bonding performance of the air compression sealing repair material is good, the surface of the air compression sealing repair material is in a molten state after being treated according to the method of the invention.
Preferably, the material level of the sample to be detected in the coal tar test crucible is not more than 3/4 of the height of the coal tar test crucible.
Preferably, will wait to examine the sample and put into the back in the coke coal chemical examination crucible, make coke coal chemical examination crucible slope adopts the end to have the clockwise stirring of steel needle of phi 5mm ring in order to guarantee wait to examine the homogeneity of sample.
Preferably, the stirring speed is 100-120 r/min, and the stirring time is 2 min.
Preferably, the muffle furnace is an XL-2100 type intelligent integrated muffle furnace.
Preferably, the appearance of the sample to be detected is in a molten state, the smaller the change of the quality and/or volume of the sample to be detected is, the fewer cracks are, and the better the service performance is.
The invention has the beneficial effects that: the method for inspecting the performance of the coke oven air compression sealing repair material can quickly, visually and scientifically inspect various performances of the air compression sealing repair material through one-time operation, and does not need to inspect indexes such as components, refractoriness and granularity of the air compression sealing repair material respectively.
The method for inspecting the performance of the coke oven air compression sealing repair material can simulate the temperature rise and the temperature drop of the actual working environment of the air compression sealing repair material, has good consistency with the actual application condition, and has more accurate detection result. The method for inspecting the performance of the coke oven air compression sealing repair material has the advantages of time saving, low cost and the like, and can effectively avoid the damage of the coke oven caused by the improper air compression sealing repair material and the influence on the normal work of the coke oven.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a graph showing the detection effect of No. 1 and No. 2 air compression mending material according to the method for testing the performance of the coke oven air compression sealing mending material in the embodiment 1 of the invention, wherein the left graph is a sample 1 obtained by processing the No. 1 air compression mending material, and the right graph is a sample 2 obtained by processing the No. 2 air compression mending material;
FIG. 2 is a graph showing the detection effects of No. 1 and No. 2 air compression mending material according to the method for testing the performance of the coke oven air compression sealing mending material in example 2 of the present invention, wherein the left graph is sample 3 obtained by processing the No. 2 air compression mending material, and the right graph is sample 4 obtained by processing the No. 1 air compression mending material;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The performance of the No. 1 air compression sealing material and the No. 2 air compression sealing material is verified according to the method of the invention, wherein:
the specific component of the No. 1 air compression sealing repair material is
The No. 2 air compression sealing repair material comprises the following specific components:
example 1
(1) Two coke assay crucibles with the same size are taken and cleaned to ensure that no sundries exist in the crucibles, and equal amounts of 1# and 2# air compression sealing repair materials are respectively filled into the two cleaned coke assay crucibles (30.000 g of the 1# and 2# air compression sealing repair materials are respectively weighed by a test balance). The material level of the No. 1 and No. 2 air compression sealing repair materials does not exceed 3/4 of the height of the coke test crucible.
(2) And (3) respectively inclining the coke assay crucibles filled with the No. 1 and No. 2 air compression sealing repair materials by an angle of 45 degrees, and clockwise stirring for 2min by using a steel needle with a phi 5mm circular ring at the tail end, wherein the stirring speed is 100-120 r/min. And after stirring, respectively placing the coal coke test crucibles filled with the No. 1 and No. 2 air compression sealing repair materials on a flat experiment table, and slightly shaking to enable the upper surfaces of the sealing repair materials in the coal coke test crucibles to be horizontal. In the whole process, the mending material is not contacted with hands or other tools and objects, and the mending material cannot be polluted by other samples.
(3) Putting the coke test crucibles containing the No. 1 and No. 2 air compression sealing repair materials into the same XL-2100 type intelligent integrated muffle furnace (keeping the upper surface level of the sealing repair material in the coke test crucibles), then setting the muffle furnace to heat from room temperature to 900 ℃ at the speed of 40 ℃/min, heating to 900 ℃, then heating to 1100 ℃ at the speed of 33 ℃/min, heating to 1100 ℃ and then heating to 1360 ℃ at the speed of 20 ℃/min.
(4) Heating to 1360 ℃, keeping the temperature for 10-15min, taking out, placing at room temperature, naturally cooling, and observing the bonding property of the repair material. Because the cooling rate is close to that of the coke oven in the conventional production process after the oven door is opened, the air compression sealing repair material is observed to be separated from the crucible or not due to the rapid reduction of the temperature after the air compression sealing repair material is condensed with the crucible; after the air compression sealing repair material is cooled to normal temperature, taking out the 1# and 2# air compression sealing repair material solids formed after bonding, photographing at different angles to obtain evidence to observe the size, position and shape of the cracks, and observing the smoothness (whether the surface is molten) and bonding degree (bonding strength between a sample to be detected and a coke test crucible); the heights of the 1# and 2# air compression sealing repair materials which were reduced to room temperature were measured, respectively (the change in volume of the sample to be tested was examined).
The experimental results are as follows: as shown in fig. 1, the left drawing shows a sample (sample 1) after the 1# air compression sealing repair mass treatment, and the right drawing shows a sample (sample 2) after the 2# air compression sealing repair mass treatment. The surfaces of the sample 1 and the sample 2 have no obvious cracks, the surface of the sample 1 has large granularity due to the air compression sealing material, but the surface of the sample 1# has a layer of obvious glass-like material (the surface of the sample 1 is in a molten state, and the bonding performance is better), which shows that the repairing effect is better when the 1# air compression sealing repairing material is used for repairing a coke oven.
When the No. 1 and No. 2 air compression sealing repair materials are placed into an XL-2100 type intelligent integrated muffle furnace, the upper surfaces of the materials are horizontal, and the heights of samples are both 40 mm; the height of sample 1 was measured to be 35.5mm, the height of sample 2 was measured to be 31.2mm, and the volume of sample 2 varied significantly. The 2# air compression sealing repair material has large loss in the repair process, and if the 2# air compression sealing repair material is adopted to repair the coke oven, under the same condition, the amount of the 2# air compression sealing repair material which needs to be consumed is larger, the repair cost is higher, and the service life after repair is shorter.
Example 2
(1) Two coke assay crucibles with the same size are taken and cleaned to ensure that no sundries exist in the crucibles, and equal amounts of 1# and 2# air compression sealing repair materials are respectively filled into the two cleaned coke assay crucibles (30.000 g of the 1# and 2# air compression sealing repair materials are respectively weighed by a test balance). The material level of the No. 1 and No. 2 air compression sealing repair materials does not exceed 3/4 of the height of the coke test crucible.
(2) And (3) respectively inclining the coke assay crucibles filled with the No. 1 and No. 2 air compression sealing repair materials by an angle of 45 degrees, and clockwise stirring for 2min by using a steel needle with a phi 5mm circular ring at the tail end, wherein the stirring speed is 100-120 r/min. And after stirring, respectively placing the coal coke test crucibles filled with the No. 1 and No. 2 air compression sealing repair materials on a flat experiment table, and slightly shaking to enable the upper surfaces of the sealing repair materials in the coal coke test crucibles to be horizontal. In the whole process, the mending material is not contacted with hands or other tools and objects, and the mending material cannot be polluted by other samples.
(3) Putting the coke test crucibles containing the No. 1 and No. 2 air compression sealing repair materials into the same XL-2100 type intelligent integrated muffle furnace (keeping the upper surface of the sealing repair material in the coke test crucibles flat), then setting the muffle furnace to heat from room temperature to 900 ℃ at the speed of 55 ℃/min, heating to 900 ℃, then heating to 1100 ℃ at the speed of 38 ℃/min, heating to 1100 ℃ and then heating to 1360 ℃ at the speed of 25 ℃/min.
(4) Heating to 1360 ℃, keeping the temperature for 10min, taking out, placing at room temperature, naturally cooling, and observing the bonding property of the repair material. Because the cooling rate is close to that of the coke oven in the conventional production process after the oven door is opened, the air compression sealing repair material is observed to be separated from the crucible or not due to the rapid reduction of the temperature after the air compression sealing repair material is condensed with the crucible; after the air compression sealing repair material is cooled to normal temperature, taking out the 1# and 2# air compression sealing repair material solids formed after bonding, photographing at different angles to obtain evidence to observe the size, position and shape of the cracks, and observing whether the surface is in a molten state; the heights of the 1# and 2# air compression repair patches were measured, respectively, as they were cooled to room temperature.
The experimental results are as follows: as shown in fig. 2, the left drawing shows a sample (sample 3) after the No. 2 air compression sealing repair material treatment, and the right drawing shows a sample (sample 4) after the No. 1 air compression sealing repair material treatment. No obvious cracks are found on the surfaces of the samples 3 and 4, and compared with the sample 3, the surface of the sample 4 has obvious molten substances, which shows that when the No. 1 air compression sealing repair material is used for repairing a coke oven, the bonding performance is better, and the repairing effect is better.
When the No. 1 and No. 2 air compression sealing repair materials are placed into an XL-2100 type intelligent integrated muffle furnace, the upper surfaces of the materials are horizontal, and the heights of samples are both 40 mm; the height of sample 3 was measured to be 28.7mm and the height of sample 4 was measured to be 36.2 mm. The 2# air compression sealing repair material has large loss in the repair process, and if the 2# air compression sealing repair material is adopted to repair the coke oven, under the same condition, the amount of the 2# air compression sealing repair material which needs to be consumed is larger, the repair cost is higher, and the service life after repair is shorter.
Example 3
Respectively using the No. 1 and No. 2 air compression sealing repair materials for repairing the coke oven
(1) In the production of the coke oven, two carbonization chambers with the same series leakage are selected, marked with No. 1 and No. 2, coke in the carbonization chambers is pushed out, and the coke is burnt for half an hour for being empty.
(2) The charging bucket for sealing is well placed, the coke side ascending pipe of the machine is covered, the furnace cover is sealed by mud, the furnace door is sealed, and the vertical fire path covers at two sides are pulled open.
(3) And pouring the sealing material into the funnel, sending compressed air (more than or equal to 0.6Mpa) for half an hour, stopping air supply, waiting for 1 hour and 25 minutes, spraying again, repeatedly spraying for 2-3 times, and loading coal after the operation is finished.
(4) And adding 50kg of No. 1 and No. 2 air compression sealing materials into the marked No. 1 and No. 2 series-leakage carbonization chambers respectively according to the operation steps.
(5) And then observing the leakage condition after adding coal.
The experimental results are as follows: the phenomenon of the coking chamber leakage using the No. 1 air compression sealing material is remarkably reduced compared with that using the No. 2 air compression sealing material, and after 7 days of observation, the phenomenon of the coking chamber leakage using the No. 2 air compression sealing material is the same as that before air compression sealing, and the phenomenon that the coking chamber using the No. 1 air compression sealing material is not expanded temporarily. The 1# air compression sealing material can still keep higher bonding strength after multiple times of friction of coal and coke in the carbonization chamber. The 1# air compression sealing material is proved to have better performance than the 2# air compression sealing material, and the effectiveness of the method for testing the performance of the air compression sealing repair material is also verified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method for testing the performance of a coke oven air compression sealing repair material is characterized by comprising the following steps: (1) putting a sample to be detected into a coke assay crucible, and uniformly stirring; (2) and (3) heating: putting the coke assay crucible with the sample to be detected, which is processed in the step (1), into a muffle furnace, keeping the surface of the sample to be detected flat, heating the sample to be detected to 900-950 ℃ at a speed of 40-55 ℃/min, heating the sample to 1100-1150 ℃ from 900-950 ℃ at a heating rate of 33-38 ℃/min, and heating the sample to 1360-1400 ℃ from 1100-1150 ℃ at a heating rate of 20-25 ℃/min; (3) and (3) heat preservation: after the temperature rise is finished, keeping the temperature at 1360 ℃ for 10-15 min; (4) taking out the mixture from a muffle furnace, and naturally cooling the mixture at room temperature; (5) observing whether the sample to be detected is bonded with the coal coke assay crucible or not and whether the sample to be detected is separated from the coal coke assay crucible or not in the cooling process; and when the temperature of the coke testing crucible is reduced to the room temperature, inspecting the quality and/or volume change, the appearance whether the sample to be detected is molten or not and whether cracks exist or not.
2. The method of claim 1, wherein the level of the sample to be tested in the char assay crucible does not exceed 3/4 the height of the char assay crucible.
3. The method for inspecting the performance of the coke oven air compression sealing repair material according to claim 1, wherein after a sample to be inspected is placed in a coke coal testing crucible, the coke coal testing crucible is inclined, and a steel needle with a phi 5mm circular ring at the tail end is adopted for clockwise stirring to ensure the uniformity of the sample to be inspected.
4. The method for inspecting the performance of the coke oven air compression sealing repair material according to claim 3, wherein the stirring speed is 100-120 r/min, and the stirring time is 2 min.
5. The method of testing coke oven air compression seal repair batch performance of claim 1, wherein the muffle is an XL-2100 type intelligent integrated muffle.
6. The method of claim 1, wherein the sample is melted and the smaller the change in mass and/or volume of the sample, the fewer cracks, and the better the performance.
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| EP0007646A1 (en) * | 1978-08-02 | 1980-02-06 | Uss Engineers And Consultants, Inc. | Coke oven patching and sealing material, method of patching and sealing cracks in coke ovens |
| CN1683271A (en) * | 2004-04-14 | 2005-10-19 | 宝山钢铁股份有限公司 | Refractory dry powder seal material for coke furnace |
| WO2016136191A1 (en) * | 2015-02-25 | 2016-09-01 | Ｊｆｅスチール株式会社 | Method of evaluating coal and method of manufacturing coke |
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| EP0007646A1 (en) * | 1978-08-02 | 1980-02-06 | Uss Engineers And Consultants, Inc. | Coke oven patching and sealing material, method of patching and sealing cracks in coke ovens |
| CN1683271A (en) * | 2004-04-14 | 2005-10-19 | 宝山钢铁股份有限公司 | Refractory dry powder seal material for coke furnace |
| WO2016136191A1 (en) * | 2015-02-25 | 2016-09-01 | Ｊｆｅスチール株式会社 | Method of evaluating coal and method of manufacturing coke |
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